33394 データシートの表示（PDF） - Freescale Semiconductor

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33394

Switch Mode Power Supply with Multiple Linear Regulators and High Speed CAN Transcelver

Freescale Semiconductor 

Freescale Se3m33ic94onductor, Inc.

3. ELECTRICAL CHARACTERISTICS (–40°C ≤ TA ≤ +125°C; +4.0 V ≤ VBAT ≤ +26.5 V using the 33394 typical application

circuit – see Figure 1, unless otherwise noted.)

Characteristic

Symbol

Min.

Typ.

Max.

Unit

DC CHARACTERISTICS:

BUCK CONVERTER

Buck Converter Output Voltage, VBAT = 7.5V to 18V; ILOAD=500mA

VPRE

5.4

5.6

5.8

V

Buck to Boost Mode Threshold Voltage

(Note 1)

VBATthd

6.7

V

Boost to Buck Mode Threshold Voltage

(Note 1)

VBATthu

7.2

V

N–channel power MOSFET SW1

SW1 Drain–Source Breakdown Voltage

(Note 1)

SW1 Continuous Drain Current

SW1 Drain–Source Current Limit

SW1 Drain–Source On–Resistance; ID = 1.0 A, VBAT = 9.0 V

Error Amplifier (Design Information Only)

BVDSS

IDSW1

IscSW1

RDS(on)

50

–2.75

–2.5

–3.0

V

A

–3.5

A

300

mΩ

Input Offset Voltage

DC Open Loop Gain

Unity Gain Bandwidth

(Note 1)

(Note 1)

(Note 1)

VOS

AVOL

BW

20

mV

80

dB

1.5

MHz

Output Voltage Swing — High Level

Output Voltage Swing — Low Level

Output Source Current

Output Sink Current

Ramp Generator

(Note 1)

(Note 1)

(Note 1)

(Note 1)

VOH

VOL

IOUT

IOUT

4.2

V

0.4

V

1.0

mA

200

µA

Sawtooth Peak Voltage

Sawtooth Peak–to–Peak Voltage

BOOST CONVERTER

External Power MOSFET Gate Drive SW2G

(Note 1)

(Note 1)

VOSC

VOSCp–p

3.5

V

3.0

V

Boost Converter Output Voltage, VBAT = 4.5 V to 6.0 V (Note 1)

VPRE

5.9

6.0

6.6

V

SW2G Output Voltage, Power MOSFET On

SW2G Source Continuous Current

SW2G Sink Continuous Current

AC CHARACTERISTICS:

BUCK CONVERTER

Oscillator Frequency

(Note 1)

(Note 1)

Vg

Isource

Isink

Freq

VPRE

V

TBD

mA

200

300

400

mA

180

200

220

kHz

SW1 Switch Turn–ON Time

SW1 Switch Turn–OFF Time

SW2G Switch Turn–ON Time, Cgate = pF

SW2G Switch Turn–OFF Time, Cgate = pF

OFF Time

Duty cycle

(Note 1)

(Note 1)

(Note 1)

(Note 1)

(Note 1)

(Note 1)

tT–ON

tT–OFF

tT–ON

tT–OFF

tOFF

d

TBD

ns

TBD

ns

TBD

ns

TBD

ns

1.25

µs

75

%

NOTE:

1. Guaranteed by design but not production tested.

For More Information On This Product,

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